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A317816 Number of nXn 0..1 arrays with every element unequal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
0, 5, 35, 702, 8556, 296968, 7370716, 384248160, 21424520640, 1842317433367, 222676829507057, 36099873530494859, 9133843424563202164 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A317823.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..1..1..1. .0..1..0..1..1. .0..1..0..0..1. .0..1..0..1..0
..0..0..0..0..0. .1..0..0..0..0. .1..1..1..0..0. .1..0..0..1..1
..1..0..0..1..1. .1..0..0..1..1. .0..1..1..0..0. .0..0..1..1..0
..1..0..1..1..0. .1..1..1..1..0. .0..1..1..0..1. .1..1..1..0..0
..0..0..1..0..1. .0..1..1..0..1. .0..0..1..0..1. .0..1..0..1..1
CROSSREFS
Cf. A317823.
Sequence in context: A089043 A317995 A260075 * A034236 A058015 A053420
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 07 2018
STATUS
approved

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Last modified March 2 10:43 EST 2024. Contains 370466 sequences. (Running on oeis4.)